Overview of undulator concepts for attosecond single-cycle light

Alan Mak, Georgii Shamuilov, Peter Salén, János Hebling, Yuichiro Kida, Brian McNeil, Takashi Tanaka, Neil Thompson, David Dunning, Zoltán Tibai, Gyōrgy Tóth, Vitaliy Goryashko

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The production of intense attosecond light pulses is an active area in accelerator research, motivated by the stringent demands of attosecond science: (i) short pulse duration for resolving the fast dynamics of electrons in atoms and molecules; (ii) high photon flux for probing and controlling such dynamics with high precision. While the free-electron laser (FEL) can deliver the highest brilliance amongst laboratory x-ray sources today, the pulse duration is typically 10–100 femtoseconds. A major obstacle to attaining attosecond duration is that the number of optical cycles increases with every undulator period. Hence, an FEL pulse typically contains tens or hundreds of cycles. In recent years, several novel concepts have been proposed to shift this paradigm, providing the basis for single-cycle pulses and paving the way towards high-brilliance attosecond light sources. This article gives an overview of these concepts.
Original languageEnglish
Number of pages5
JournalJournal of Physics: Conference Series
Publication statusPublished - 5 Oct 2018
Event9th International Particle Accelerator Conference, IPAC18 -
Duration: 29 Apr 20184 May 2018


  • attosecond light pulses
  • attosecond science
  • free-electron lasers


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